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Preparation of (Pb,Ba)TiO3 powders and highly oriented thin films by a sol-gel process

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Abstract

Solid solution Pb1-xBaxTiO3, with particular emphasis on Pb0.5Ba0.5TiO3, was prepared using a sol-gel process incorporating lead acetate trihydrate, barium acetate, and titanium isopropoxide as precursors, acetylacetone (2,4 pentanedione) as a chelating agent, and ethylene glycol as a solvent. The synthesis procedure was optimized by systematically varying acetylacetone: Ti and H2O:Ti molar ratios and calcination temperature. The resulting effects on sol and powder properties were studied using thermogravimetric analysis/differential scanning calorimetry, Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller analysis, and x-ray diffraction (XRD). Crystallization of the perovskite structure occurred at a temperature as low as 450 °C. Thin films were prepared by spin coating on (100) MgO. Pyrolysis temperature and heating rate were varied, and the resultant film properties investigated using field-emission scanning electron microscopy, atomic force microscopy, and XRD. Under optimized conditions, highly oriented films were obtained at a crystallization temperature of 600 °C.

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Authors and Affiliations

  1. Department of Materials Science, California Institute of Technology, 91125, Pasadena, California, USA

    Stacey W. Boland, Suresh C. Pillai, Wein-Duo Yang & Sossina M. Haile

Authors
  1. Stacey W. Boland
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  2. Suresh C. Pillai
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  3. Wein-Duo Yang
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  4. Sossina M. Haile
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Correspondence to Sossina M. Haile.

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Boland, S.W., Pillai, S.C., Yang, WD. et al. Preparation of (Pb,Ba)TiO3 powders and highly oriented thin films by a sol-gel process. Journal of Materials Research 19, 1492–1498 (2004). https://doi.org/10.1557/JMR.2004.0199

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  • DOI: https://doi.org/10.1557/JMR.2004.0199

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